Battery device and battery pack

Abstract

A battery pack includes a housing, a number of battery cells received in the housing, and an electrical connection plate module for connecting the battery cells together. The housing defines a number of wedge-shaped grooves. The battery pack further includes a number of electrically insulated heat conductive pads received in the wedge-shaped grooves and at least one heat conductive plate. The heat conductive plate forms a number of first wedge-shaped protrusions and is mounted on the housing. The first wedge-shaped protrusions cooperate with the wedge-shaped grooves to press the electrically-insulated heat conductive pads on the electrical connection plate module.

What is claimed is: 
     
         1 . A battery pack comprising:
 a housing comprising:
 at least one first receiving groove with an open end; and 
 a plurality of wedge-shaped grooves; 
   a plurality of battery cells received in the housing comprising:
 a plurality of electrically-insulated heat conductive pads received in the wedge-shaped grooves; 
 at least one conductive plate with a plurality of first wedge-shaped protrusions, received in the first receiving groove; and 
 at least one outer cover; and 
   an electrical connection plate module used to electrically connect the plurality of battery cells,   
       wherein the first receiving groove is used for receiving a corresponding heat conductive plate, the plurality of wedge-shaped grooves extend through the housing from the open end of the first receiving groove, the first receiving groove corresponding to the wedge-shaped grooves is far from the battery cell, the plurality of electrically-insulated heat conductive pads are received in the wedge-shaped grooves, the heat conductive plate has a plurality of first wedge-shaped protrusions, the first wedge-shaped protrusions press the electrically-insulated heat conductive pads close to the electrical connection plate module, the outer cover is mounted on the housing and covers the heat conductive plate, a second receiving groove is formed between the outer cover and the heat conductive plate, a plurality of second wedge-shaped protrusions are formed on one end of the outer cover and cooperates with the open end of the first receiving groove and the wedge-shaped groove to prevent the heat conductive plate to slide along the extension direction of the wedge-shaped grooves. 
     
     
         2 . The battery pack according to  claim 1 , wherein the material of electrically-insulated heat conductive pads is selected from silicone, rubber, or polymer. 
     
     
         3 . The battery pack according to  claim 1 , wherein the battery cells are arranged as a plurality of rows, the shape of the electrically-insulated heat conductive pads is an elongated strip shape. 
     
     
         4 . The battery pack according to  claim 1 , wherein the conductive plate comprising an second inner surface and an second outer surface, the second outer surface is flat and the second inner surface with a plurality of the first wedge-shaped protrusions. 
     
     
         5 . The battery pack according to  claim 1 , wherein the heat conductive plate is an aluminum plate. 
     
     
         6 . The battery pack according to  claim 1 , wherein the outer cover has a plurality of projecting spacer blocks. 
     
     
         7 . A battery device comprising:
 a base;   a heat dissipation unit; and   a battery module disposed on the base comprising:
 a battery-pair structure, comprising
 two battery packs which are arranged as side by side and spaced from each other, the battery pack comprising:
 a housing comprising: 
 at least one first receiving groove with an open end; and 
 a plurality of wedge-shaped grooves; 
 a plurality of battery cells received in the housing comprising: 
 a plurality of electrically-insulated heat conductive pads received in the wedge-shaped grooves; 
 at least one heat conductive plate with a plurality of first wedge-shaped protrusions; and 
 at least one outer cover; and 
 an electrical connection plate module used to electrically connect the plurality of battery cells, 
 
 
   wherein the first receiving groove is used for receiving a corresponding heat conductive plate, the plurality of wedge-shaped grooves extend through the housing from the open end of the first receiving groove, the first receiving groove corresponding to the wedge-shaped grooves is far from the battery cell, the plurality of electrically-insulated heat conductive pads are received in the wedge-shaped grooves, the heat conductive plate has a plurality of first wedge-shaped protrusions, the first wedge-shaped protrusions press the electrically-insulated heat conductive pads close to the electrical connection plate module, the outer cover is mounted on the housing and covers the heat conductive plate, a second receiving groove is formed between the outer cover and the heat conductive plate, a second wedge-shaped protrusion is formed on one end of the outer cover and cooperates with the open end of the first receiving groove and the wedge-shaped groove to prevent the heat conductive plate to slide along the extension direction of the wedge-shaped grooves,   wherein the heat dissipation unit connects to the battery module and includes at least one heat conductive element corresponding to the battery-pair structure, the heat conductive element is across the gap between the two battery packs and connects to the two battery packs, the heat conductive element inserts into the second receiving groove to connect to the heat conductive plate corresponding to the battery-pair structure, the heat conductive element includes a plurality of heat conductive members, the heat conductive members are at a divergent state on the heat conductive plate of the battery pack, and are at a concentrated state between intervals of the battery packs.   
     
     
         8 . The battery device according to  claim 7 , wherein the material of electrically-insulated heat conductive pads is selected from silicone, rubber, or polymer. 
     
     
         9 . The battery device according to  claim 7 , wherein the battery cells are arranged as a plurality of rows, the shape of the electrically-insulated heat conductive pads is an elongated strip shape. 
     
     
         10 . The battery device according to  claim 7 , wherein the conductive plate comprising an second inner surface and an second outer surface, the second outer surface is flat and the second inner surface with a plurality of the first wedge-shaped protrusions. 
     
     
         11 . The battery device according to  claim 7 , wherein the heat conductive plate is an aluminum plate. 
     
     
         12 . The battery device according to  claim 7 , wherein the outer cover has a plurality of projecting spacer blocks. 
     
     
         13 . The battery device according to  claim 7 , wherein the heat conductive member is a heat pipe. 
     
     
         14 . The battery device according to  claim 7 , wherein the heat dissipation unit comprises a cooling block and a connecting portion connecting with the heat conductive element and the cooling block. 
     
     
         15 . The battery device according to  claim 14 , wherein the connecting portion is disposed within a gap between the battery packs of the battery-pair structure, and the ends of the connecting portion connect a portion of the heat conductive element where the portion of the heat conductive element is across the gap between the battery packs. 
     
     
         16 . A heat dissipating battery device comprising:
 a plurality of battery packs arranged in at least two substantially parallel rows, with a space between the rows and a gap between the battery packs;   a plurality of heat conducting elements, each of the plurality of heat conducting elements comprising a plurality of heat conductive members, each of the plurality heat conductive members having a center portion, a first extending portion extending away from the center portion into the gaps of a first row of battery packs, and a second extending portion extending away from the center portion into the gaps of an adjoin row of battery packs;   at least one cooling blocks, the cooling block positioned in each of the spaces between the battery pack rows; and   a plurality of connecting portions connecting the plurality of heat conducting elements to the cooling blocks;   wherein the heat conducting element is positioned at each end of each battery pack row;   wherein the first extending portion and the second extending portion comprises multiple finger-like elements;   wherein the center portion of one of the plurality of conducting elements is connected to one of the plurality of connecting portions, and each of the plurality of connecting portions is connected to one of the cooling blocks;   wherein each of the cooling blocks defines a space through which cooling fluid may flow; and   wherein when cooling fluid flows through the defined space of each of the cooling blocks, heat from the plurality of battery cells is drawn through the plurality of first extending portions and the plurality of second extending portions to the plurality of center portion of the heat conducting element to the plurality of connecting portions to the cooling blocks and dissipated by the flowing cooling fluid.   
     
     
         17 . The battery device according to  claim 16 , wherein the heat conductive members are made by the material selected from copper or aluminum. 
     
     
         18 . The battery device according to  claim 16 , wherein the heat conductive member is a heat pipe.